Angola, Luanda - Some 570 cases of fainting of students at schools were recorded over the last 24 hours, in the provinces of Luanda and Namibe, for alleged intoxication through toxic gas, says the National Service of Civil Protection, ANGOP has learnt. The institution's spokesman, Faustino Sbastião, said that 474 cases were recorded in Luanda, in the districts of Cacuaco, Kilamba Kiaxi and Viana, and the remainder in the southern Namibe Province.